It covers the glottis, preventing swallowed food from entering

A large, elastic and spongy sac. To provide means of gas exchange between environment and body.

Separating the lungs from the chest wall is a protective doubled-layered membrane is called?

The diaphragm contracts and moves downward to give more space to the lungs.

The diaphragm return to its normal shape and position.

Which of the following is NOT part of the respiratory system?

Is an infection of the alveoli, secondary to aspiration of bacterial pathogens into the lower respiratory tract.